Questions tagged [textures]

A bitmap (raster image) used in a texture mapping process.

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3answers
3k views

Is it possible to batch draw sprites that use different textures without using an atlas?

I've implemented a sprite batch class that uses a sampler array so that I can select a texture to use based on the gl_PrimitiveID. The idea was to be able to draw sprites that use different textures ...
10
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1answer
2k views

Procedurally generated terrain map. Blend Transitions between terrain types

The question isn't the greatest wording ever sorry. I have been learning about and prototyping some texture and terrain generation stuff and have run into something perhaps you can help me with. How ...
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1answer
25k views

How to render a texture partly transparent?

Good Morning StackOverflow, I'm having a bit of a problem right now as I can't seem to find a way to render part of a texture transparently with openGL. Here is my setting : I have a quad, ...
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1answer
432 views

Is it a good idea to render many textures into one texture?

I'm making a 2D game with OpenGL. In order to avoid changing the state machine and binding at runtime, I want to make consolidate my textures into bigger textures, for example, taking 4 128x128 ...
3
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1answer
3k views

Reusing a render target to create multiple Texture2D's (XNA)

i want to be able to loop through a hole bunch of textures, and render them on an object. I then want the rendered image to be placed onto a texture2D. The point? well hopefully i will end up with an ...
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2answers
4k views

Game Sprite Editting Help(PNG-XNB)

I converted my project's .xnb files to .png files using a program and I can't seem to find a way to transform .png back to .xnb. I don't want to lose the work I've done. How can I change the images ...
2
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1answer
2k views

OpenGLES 2.0: Rendering Multiple Sprites - Texel Corruption

I'm having a tremendous time getting the second (or additional) sprites in my game engine to render properly. The first one always works great: it is positioned and sized properly in screen coords, ...
3
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1answer
1k views

XNA: Retrieve texture file name during runtime

I'm trying to retrieve the names of the texture files (or their locations) on a mesh. I realize that the texture file name information is not preserved when the model is loaded. I've been doing ...
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4answers
8k views

Tool to convert Textures to power of two?

I'm currently porting a game to a new platform, the problem being that the old platform accepted non power of two textures and this new platform doesn't. To add to the headache, the new platform has ...
6
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2answers
4k views

Rendering multiple textures on a terrain in XNA / C#

I am working on a terrain in XNA/C#. My intention is to be able to render multiple textures on the ground across the terrain. However, all tutorials like this are only capable of doing it with about 3-...
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1answer
1k views

Android : Some textures not loading after resuming twice

This is an odd one. When I press home and then restart my game I reload all my textures (checking glIsTexture on the id's first). If I do this once, all textures load as expected, but if I do it ...
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2answers
2k views

How do I draw a portion of a texture onscreen in OpenGL?

I have a sprite sheet loaded as an OpenGL texture, and I'd like to draw a portion of that texture sequentially for animation. Is there an actual OpenGL command to draw part of a texture? I can get it ...
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3answers
3k views

Skybox textures for our solar system

For a solar system simulation project I'm looking for a good (semi-accurate) set of textures to texture the skybox. I've already found these http://paulbourke.net/miscellaneous/starfield/ and we ...
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1answer
1k views

Stretching textures for CCSprites in Cocos2D

I'm making a game for iPhone and iPad w/ Cocos2D and Box2D. I scale the size of square objects ("blocks") using a pixel-to-meters ratio depending on the particular device. Can I stretch or shrink ...
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5answers
7k views

Skybox texture artifact on edge

I have strange problem with drawing skybox texture on Mac. On iPhone everything is going fine. I have tried to change near and far planes value with no success. It is a skybox of six textures, and ...
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1answer
5k views

How to create mipmap for Unity3d textures loaded with www?

When I load a texture using the code below: ...
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5answers
11k views

Batch conversion of PVR to JPEG (or similar)

The command line PVRTexTool works very well for getting textures into a PVR format, but I need a way of going the opposite directions. Does anyone know of a good command line tool (or GUI with a batch ...
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1answer
1k views

What are the texture coordinates for a tetrahedron

EDIT This is the WebGL code for initializing the tetrahedron points. You may want to skip to the second code block, because you may be able to answer without this. ...
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3answers
2k views

Is there a tool to automatically pack individual textures into one big png? [closed]

I'm currently was working on a texture pack for minecraft (but this question is not restricted to that). All terrain textures are squared and stored in one big terrain.png. (FYI that's from Glimmar's ...
6
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3answers
357 views

How to make a hand-drawn squared texture periodic with as little modification as possible?

The obvious part is drawing as periodic as possible, but hand-drawing is impossibly so perfect, so what kind of modifications are possible that do not make the textures loose their hand-drawn ...
3
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2answers
10k views

Xna: Splitting one large texture into an array of smaller textures

I would like to split a large texture into a one dimensional array of smaller textures. How should I do this?
9
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2answers
3k views

Xna: Texture2D from a png file

I'm making a tile based game, and I'm working for support of tilesets. I'm trying to make it so that a Texture2D is set as a chosen PNG file. I can do this with no problem f I load the image into the ...
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3answers
1k views

How on earth do you get decent color out of 2BPP?

I've been looking into PowerVR textures, and have run into several textures that are apparently 2 bits per-pixel. This, frankly, boggles my mind. How does one get even half way decent color ...
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4answers
1k views

Megatexturing : Evolution from Quake Wars to Rage

I remember John Carmack talking about how they initially used Megatexturing for Quake Wars: Enemy Territory. The technology has since evolved quite a bit in Rage. I was wondering if somebody here ...
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2answers
1k views

texture distortion at a distance

I produce a strip of quads with texture coordinates to represent a path. My texture is tiled along these quads. When the quad is drawn very small (on my integrated Intel chip) it draws distorted. ...
3
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2answers
302 views

Is it ok to use NPOT textures with OpenGL in this situation?

I drew some icons to use on orthographic projection and instead of loading each icon file individually as a texture I thought of putting them all together in one single file. Now I have a file ...
2
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1answer
6k views

How to properly repeat a texture on a quad in OpenGL?

I'm drawing a quad and binding a texture to this quad like this: ...
11
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1answer
588 views

XNA Adding Craters (via GPU) with a “Burn” Effect

I am currently working on a 2D "Worms" clone in XNA, and one of the features is "deformable" terrain (e.g. when a rocket hits the terrain, there is an explosion and a chunk of the terrain disappears). ...
3
votes
1answer
4k views

Loading textures in OpenGL makes everything look darker

I don't know what I'm doing wrong but I'm having a big a problem with GL_TEXTURE_MIN_FILTER when loading textures for my scene. I'm doing a skybox, but that's irrelevant because the problem exists ...
9
votes
4answers
8k views

Can't understand these UV texture coordinates (range is NOT 0.0 to 1.0)

I am trying to draw a simple 3D object generated by Google SketchUp 8 Pro onto my WebGL app, the model is a simple cylinder. I opened the exported file and copied the vertices positions, indices, ...
10
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2answers
1k views

Half-Life 2 BSP Lightmaps

I'm writing a BSP viewer for a university project. So far I have the main geometry loaded properly, and the PVS working. Now I'm trying to apply the lightmaps, but I can't seem to get the texture ...
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1answer
1k views

OpenGL - resize texture when using cubemap

I want to resize my texture. I am using cubemap to compute reflection. I want to use this cubemap to draw skybox. Skybox is drawn but I want to resize texture down, because it is dilated. As I wrote ...
3
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2answers
2k views

blending alpha textures in gluOrtho2D

i'm doing a simple game/application with some minimal 2d graphics: png textures and ploygons with standard glVertex calls my setting: ...
2
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2answers
5k views

How do I create a sky box with OpenGL ES 2.0?

Can you give me hint to any good sky box example in OpenGL ES 2.0? I have found only OpenGL and does not work for me. I am doing it this way: Initialization: ...
0
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1answer
2k views

3D Paint tool in Maya

Hey everyone, could someone help me out on this question? When I am trying to texture objects in maya (for example a barrel) I want to texture it with a brush. When I try to use the 3D painting tool ...
2
votes
4answers
3k views

Is there a command line ATI texture compression tool?

Is there a command line tool that can convert PNG and JPG files to ATITC compressed textures? I have my own export pipeline that converts all textures to PVRTC, ATITC, and DXT, so I have no use for a ...
3
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3answers
161 views

What kind of skills are required to work in a content pipeline department in a high level role

I'm looking more for high level role such as producer/manager of the group making the tools for a content pipeline. This would be for a large AAA studio. Also what kinds of tools are they creating?
33
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4answers
32k views

What are 3D textures?

Google has failed me, I could not find anything informative. So perhaps GameDev can :). What are 3D textures? When are they used? Performance costs? How are they stored? I have many vague ideas, but ...
4
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1answer
2k views

How do I render only part of a texture to a point sprite in OpenGL ES for Android?

Using the libgdx framework, I've figured out how to render a texture to a point sprite. The problem is, it renders the entire texture to the point sprite, where I only want a small part of it (since ...
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2answers
4k views

How do I draw a point sprite using OpenGL ES on Android?

Edit: I'm using the GL enum, which is incorrect since it's not part of OpenGL ES (see my answer). I should have used GL10, ...
6
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3answers
5k views

When should a bullet texture be loaded in XNA?

I'm making a SpaceWar!-esque game using XNA. I want to limit my ships to 5 active bullets at any time. I have a Bullet DrawableGameComponent and a Ship ...
9
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6answers
12k views

Library to load images into textures, Linux, C and OpenGl

I am looking for simple, self-contained C library for Linux to load images from files into OpenGL textures. The licence should be quite liberal: zlib, bsd, mit or something. I have found SOIL, however ...
4
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2answers
9k views

OpenGL-ES: clearing the alpha of the FrameBufferObject

This question is a follow-up to Texture artifacts on iPad How does one "clear the alpha of the render texture frameBufferObject"? I've searched around here, StackOverflow and various search engines ...
3
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1answer
489 views

Hashing 3D position into 2D position

I am doing volumetric raycasting and curently working on depth jitter. I have 3D position on ray and want to sample 2D noise texture to jitter the depth. Function for converting (or hashing) 3D ...
4
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2answers
5k views

[Unity] Render an animated texture to a screen

I'm looking for a way to write a typed text on a texture, and then render it on a screen: in the game it's just the screen of a computer where a scientist is typing text on. The texture will be ...
2
votes
1answer
673 views

Doubt about texture waves in CG Ocean Shader

I'm new on graphical programming, and I'm having some trouble understanding the Ocean Shader described on "Effective Water Simulation from Physical Models" from GPU Gems. The source code associated to ...
41
votes
5answers
29k views

Should I use textures not sized to a power of 2?

In the early days of OpenGL and DirectX, texture sizes were required to be powers of two. This meant interpolation of float values could be done very quickly, using shifting and such. Since OpenGL 2....
6
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3answers
2k views

Common light map practices

My scene consists of individual meshes. At the moment each mesh has its associated light map texture, I was able to implement the light mapping using these many small textures. 1) Of course, I want ...
17
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5answers
19k views

Preferred way to render text in OpenGL [closed]

I'm about to pick up computer graphics once again for an university project. For a previous project I used a library called FTGL that didn't leave me quite satisfied as it felt kind of heavy (I tried ...
8
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1answer
333 views

Is there any difference between storing textures and baked lighting for environment meshes?

I assume that when texturing environments, one or several textures will be used, and the UVs of the environment geometry will likely overlap on these textures, so that e.g. a tiling brick texture can ...